code: def register_signal_handlers(self) -> None:
      self.received_sigterm = False
      self._original_handlers = self._get_current_signal_handlers()
  
      sigusr_handlers: List[_HANDLER] = []
      sigterm_handlers: List[_HANDLER] = [self._sigterm_notifier_fn]
  
      environment = (
          self.trainer._accelerator_connector.cluster_environment
      )
      if (
          isinstance(environment, SLURMEnvironment)
          and environment.auto_requeue
      ):
          log.info(
              "SLURM auto-requeueing enabled. Setting signal handlers."
          )
          sigusr_handlers.append(self._slurm_sigusr_handler_fn)
          sigterm_handlers.append(self._sigterm_handler_fn)
  
      # Windows seems to have signal incompatibilities
      if not self._is_on_windows():
          sigusr = (
              environment.requeue_signal
              if isinstance(environment, SLURMEnvironment)
              else signal.SIGUSR1
          )
          assert sigusr is not None
          if sigusr_handlers and not self._has_already_handler(sigusr):
              self._register_signal(
                  sigusr, _HandlersCompose(sigusr_handlers)
              )
  
          # we have our own handler, but include existing ones too
          if self._has_already_handler(signal.SIGTERM):
              sigterm_handlers.append(signal.getsignal(signal.SIGTERM))
          self._register_signal(
              signal.SIGTERM, _HandlersCompose(sigterm_handlers)
          )
  
imports: import logging
  import os
  import re
  import signal
  import sys
  import threading
  from subprocess import call
  from types import FrameType
  from typing import Any, Callable, Dict, List, Set, Union
  import lightning.pytorch
  from lightning.fabric.plugins.environments import SLURMEnvironment
  from lightning.fabric.utilities.imports import _IS_WINDOWS, _PYTHON_GREATER_EQUAL_3_8_0
  from lightning.pytorch.utilities.rank_zero import rank_prefixed_message, rank_zero_info
label_desc: Use image node_id 2 for calling the _SignalConnector obj's underlying member method code with example usage: obj.register_signal_handlers() without return types